/Engine/Source/Runtime/SlateCore/Public/Rendering/RenderingCommon.h
Called by Slate when the viewport widget is drawn Implementers of this interface can use this method to perform custom per draw functionality. This is only called if the widget is visible
virtual void OnDrawViewport ( const [FGeometry](API\Runtime\SlateCore\Layout\FGeometry) & AllottedGeometry, const [FSlateRect](API\Runtime\SlateCore\Layout\FSlateRect) & MyCullingRect, class [FSlateWindowElementList](API\Runtime\SlateCore\Rendering\FSlateWindowElementList) & OutDrawElements, int32 LayerId, const [FWidgetStyle](API\Runtime\SlateCore\Styling\FWidgetStyle) & InWidgetStyle, bool bParentEnabled )